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Message Forums Car Stereo Message Forums > CarStereo.com Lobby > Spark Plug Question!!
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m0
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 Spark Plug Question!!

Okay I want to replace my spark plugs but I have a question...

My manual says that the gap should be .039 - .043 and I was looking into the NGK spark plugs and they are gapped at .044. I heard that they are really brittle so you shouldn't try to gap them.

 

Also is it really important to go by the manufacture recoomendations? Becuase I was looking into the NGK Idridium IX but the manual says to get the V-Power..

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New Post 06-04-2008 04:37 PM
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Brownie
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If the plug are a pain in th a$$ to get to and change, I would recommend getting the longer last /expensive plugs, otherwise just get the regular V-power spark-plug because 1. Their way less expensive, and 2. Their regular plugs offer better engine performance. IMO

FYI, make sure you put a little antiseize on the new sparkplug threads before installing them. to help prevent galling of the sparkplugs.

You should be fine with the .044 gap ! But check them all anyway to make sure their all gaped at .044 and adjust the gap if nessary.

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New Post 06-04-2008 05:25 PM
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michanic220
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set the gap at what the engine manufacture tells you, THEY built the engine, THEY know what its spose to run on. idc what NGK says. some plugs are pre-gapped and arent ment to be adjusted because they break easy. its at the tip of my tounge what they are but i just cant spit it out, lol. others you just use a sparkplug gauge and set them.

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New Post 07-27-2008 09:44 PM
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m0
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Well I ended up buying the Iridiums and they work great! I feel like the response is a lot smoother.. Evn tho it's gapped at .04 its okay!

 

Thanks for all your guys help

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New Post 07-28-2008 04:46 AM
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michanic220
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gapped at .04??????? no spark plug should be gapped that small its going to be hard to start down the road and flood out easier.

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New Post 08-06-2008 04:32 AM
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zlaja
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you probably wouldnt notice .01 inches

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New Post 09-08-2008 10:06 AM
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michanic220
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well, technically any gap will work as long as its not to close to cause enough of a spark to ignite the gas/air mixture. or to far away where the spark doesnt jump. spark setting isnt really that big of a deal for a daily driver, unless your driving a race car i wouldnt worry.

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New Post 12-07-2008 03:24 AM
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sicaudio
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 RE:

quote:
Originally posted on 12-07-2008 by michanic220

well, technically any gap will work as long as its not to close to cause enough of a spark to ignite the gas/air mixture. or to far away where the spark doesnt jump. spark setting isnt really that big of a deal for a daily driver, unless your driving a race car i wouldnt worry.



I have been an ase tech for 22 years  17 years of that has been as a master tech and you are way off base.   put a standard copper core plug in any older sbc and gap it at .055  watch how shitty it runs but specs are .045 - .050 depending on the year.   some engines especially newer ones are far more forgiving than others.  even with 120k volts in our racecar we can only gap to .057 -.060 running a much better fuel than a daily driver will ever see.

the iridium plugs and platinum plugs should never be gapped  they are pregapped  all you do is verify a  + or  - tolerance of .003.  the key difference is they are designed to perform at that gap as well or better than OEM  spec's change all the time.  If he took his car to the dealer they would definately recommend the iridium plug to him.

if you are not dead sure of an answer make sure you tell someone that it is your opinion  not make it seem like fact .

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New Post 04-25-2009 01:35 PM
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sicaudio
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 RE:

quote:
Originally posted on 09-08-2008 by zlaja

you probably wouldnt notice .01 inches



.01 is 10 hundreds  i think you meant .001  i.e.  .043 vs .044. 

  your example would mean .053 or .033  which is way too much difference.

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New Post 04-25-2009 01:39 PM
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